Add AWSSubsystem

[eyeinsky]

Checklist

• Add a new entry in an appropriate subdirectory of changelog.d
• Read and follow the PR guidelines

[eyeinsky]

[[email protected]] W, logger=cassandra.brig, Server warning: Read 0 live rows and 1061 tombstone cells for query SELECT * FROM brig_test.users_pending_activation WHERE  LIMIT 10000 (see tombstone_warn_threshold)
2025-11-06T12:59:43Z, D, No TLS cert file path configured.
[[email protected]] W, logger=cassandra.brig, Server warning: Read 0 live rows and 1061 tombstone cells for query SELECT * FROM brig_test.users_pending_activation WHERE  LIMIT 10000 (see tombstone_warn_threshold)
brig-integration: Assertions failed:
 1: 201 =/= 500

Response was:

Response {responseStatus = Status {statusCode = 500, statusMessage = "Internal Server Error"}, responseVersion = HTTP/1.1, responseHeaders = [("Transfer-Encoding","chunked"),("Date","Thu, 06 Nov 2025 12:59:44 GMT"),("Server","Warp/3.4.2"),("traceparent","00-059172848609ed3a19bcb6cca708e04f-4514bcead7f63d76-01"),("tracestate",""),("Content-Encoding","gzip"),("Content-Type","application/json"),("Vary","Accept-Encoding")], responseBody = Just "{\"code\":500,\"label\":\"server-error\",\"message\":\"Internal Server Error\"}", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose, responseOriginalRequest = Request {
  host                 = "127.0.0.1"
  port                 = 8082
  secure               = False
  requestHeaders       = [("Content-Type","application/json")]
  path                 = "/i/users"
  queryString          = ""
  method               = "POST"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
  proxySecureMode      = ProxySecureWithConnect
}
, responseEarlyHints = []}
CallStack (from HasCallStack):
  error, called at src/Bilge/Assert.hs:91:5 in bilge-0.22.0-inplace:Bilge.Assert
  <!!, called at test/integration/API/Team/Util.hs:140:9 in brig-2.0-inplace-brig-integration:API.Team.Util
  createUserWithTeam', called at test/integration/API/Team/Util.hs:89:21 in brig-2.0-inplace-brig-integration:API.Team.Util
  createPopulatedBindingTeamWithNames, called at test/integration/API/Team/Util.hs:68:25 in brig-2.0-inplace-brig-integration:API.Team.Util
  createPopulatedBindingTeamWithNamesAndHandles, called at test/integration/API/Search.hs:175:38 in brig-2.0-inplace-brig-integration:API.Search
[[email protected]] E, request=8d05674b-8e94-4c6b-82be-168a47cdd485, code=500, label=server-error, "Server Error"

[eyeinsky]

(This was pulled out from the big SCIM create group PR -- as that got merged then this is not required anymore.)